Improvement in hot-air furnaces



Patented Nov. 24, 1868.

WASHINGTON: n C.

strut (time.

S. J. HARE, OF LOUISVILLE, TUCKY.

7 Letters Patent No. 84,356, dated Noue'mbcr 24, 1868.

IMPROVEMENT IN HOT-AIR FURNACES.

The Schedule referred to in theselllett'ers Patent and making part of the saino.

To all whom it may concern Be it known that I, S. J. HARE, of Louisville, in the county of J eiferson, and State of Kentucky, have invented a new and useful Improvement in Hot-Air Furnaces; and I dohereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to improvements in furnaces for heatingair for warming buildings; and consists in the arrangement of parts, whereby a very large heat: radiating surface is secured, and the heat generating from the fuel is utilized.

Figure 1 a sectional elevation of the nu'nace, through the line a; a: of fig. '2.

Figure 2 is a horizontal section through the line y 3 offig. 1.

. Similar letters of reference indicate corresponding parts.

A is the hearth of the furnace.

B is the fire-box.

Q is the combustion-chamber.

E represents the ash-pit.

F is the fire-grate.

G is the aperture for the introduction of fuel.

H represents an annular drum, formed by an outer cylinder, I, and an inner cylinder, J. 'This annular drum H is connected with the combustion-chamber O by a series of shorttubes, k. i

L is a cylindrical chamber, which is connected with v the combustion-chamber O, and is, in fact, a continuation of that chamber.

m is a heavy perforated plate, situated near the upper part of L. This plate becomes heated to a high temperature, and aids greatly in producing a perfect combustion of the unconsumed gasesand smoke.

N is a pipe, through which atmospheric air is admitted to the chamber L, through the perforated plate m The annular drum H is the general receptacle for the products of combustion through the short pipes 70. v R is the discharge-pipe for the unconsumed smoke and gases.

The atmospheric air, which is admitted through the heavy perforated plate m, mingles with .the gases in T is a crank for reversing oragitating the fire+grate.

The advantages of this arrangement are many and obvious.

Mingling atmospheric air with the. products of combustion in the very large combustion-chamber, greatly economizes fuel.

The carbonic oxide formed in that chamber only requires a proper supply of oxygen for its entire consumption.

In all furnaces, where there is not the requisite quantity of atmospheric air (or oxygen) supplied, thecarbonic oxide passes ofl' unconsumed.

The very extensive heat-generating surface presented by this arrangement,'in combination with the provision for consuming the smoke and gases, must render it very effective and economical as an air-heating furnace.

I claim as new, and desire to secure by Letters Patent The described arrangement of the annular outer drum H, formed by the cylinders I J, and supported above the combustion-chamber C by the short pipes k, the central chamber L containing the perforated I plate 111, the air-pipe N and pipe 0 connecting the chamber L and drum H, the damper S, combustionchamber 0, and fire-chamber B, all constructed and operating as described, for the purpose specified.

- S. J. HARE. Witnesses:

J AMlES SomnnvILLn, O. G. Gonnon. 

